The claimWhat Shohei actually said
Ohtani told Japanese news agency Kyodo News in 2022 that sleep sits at the top of his routine, describing a target of about 10 hours overnight plus a two-hour nap before games. Sports Illustrated reported that he takes the habit seriously enough to travel with his own mattress on road trips. He has framed sleep as training infrastructure rather than downtime.
- si.com: Shohei Ohtani in their own words
- Mah CD et al., Sleep, 2011, sleep extension in collegiate basketball players improved sprint time, shooting accuracy, reaction time and mood
- Bonnar D et al., Sports Medicine, 2018, systematic review found sleep extension the most consistently beneficial sleep intervention for athletic performance and recovery
- Cappuccio FP et al., Sleep, 2010, meta-analysis of prospective cohorts found both short and long sleep duration associated with higher all-cause mortality
Why it mattersWhy this matters for longevity
Sleep is one of the few recovery levers that is free, available nightly, and measurable within days.
Elite athletes are chronically sleep-restricted by travel and late finishes, which makes Ohtani's stance unusual rather than routine.
The evidenceWhat the science says
In a Stanford sleep-extension study, collegiate basketball players who lengthened their time in bed improved sprint times, free-throw and three-point accuracy, reaction time and mood, and a later systematic review found sleep extension the most consistently effective sleep intervention for athletic performance.
What the evidence does not show is that more sleep is always better: pooled prospective cohorts find a U-shaped relationship, with habitual long sleep associated with higher all-cause mortality, so 10 hours is a young elite athlete's recovery load, not a general prescription.
TakeawayThe honest takeaway
The practical lesson
Give sleep a fixed slot in your schedule the way you would a workout, and judge it by daytime alertness rather than by hitting someone else's hour count.
RelatedRelated habits
Each of these is a habit you can build on its own. Explore them through the Topics index.
SupplementsThe supplement angle: Magnesium and melatonin
Support a habit, do not replace one
Magnesium and low-dose melatonin are commonly used around sleep timing, with modest and inconsistent effects in trials. They are not a substitute for enough time in bed, and melatonin timing matters more than dose.
Supplements can support good habits. They do not replace sleep, movement, nutrition, or medical care. Talk with your healthcare provider before starting anything new.
This is educational commentary, not medical advice, and does not imply that Shohei Ohtani endorses, is affiliated with, or uses Winning Longevity or any product. We critique the claim and the evidence, not the person. Any direct quote is a placeholder until sourced. Talk with a qualified healthcare provider before changing your routine. See our health disclaimer.
